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Posted to issues-all@impala.apache.org by "Gabor Kaszab (Jira)" <ji...@apache.org> on 2020/04/02 12:58:00 UTC

[jira] [Created] (IMPALA-9595) Predicate pushdown for complex types to scan node instead of unnest node

Gabor Kaszab created IMPALA-9595:
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             Summary: Predicate pushdown for complex types to scan node instead of unnest node
                 Key: IMPALA-9595
                 URL: https://issues.apache.org/jira/browse/IMPALA-9595
             Project: IMPALA
          Issue Type: New Feature
          Components: Backend, Frontend
            Reporter: Gabor Kaszab


Instead of evaluating predicates inside an unnest it would be better to push the predicates directly into the scanner that fills the “list of tuples” slot consumed by the unnest. For example, the predicate evaluation could be integrated into the scanner’s DFA for projecting complex input data to the minimal output tuple.




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